|Manufacturer||Società Italiana Ernesto Breda|
|Primary users||Regia Aeronautica
Royal Hungarian Air Force
Design and development
The first flight took place near Milan in 1931. Initially designed as a single-seat aircraft, the prototype was later converted to a two-seat fuselage. Flight testing of the two-seat variant was successful, and in late 1931 Regia Aeronautica ordered a series of 100 Ba.25 training aircraft. The student and instructor sat in open tandem cockpits, although some versions had a single-bay cockpit.
The initial production order was completed by 1935, but demand for the aircraft increased and production for the Regia Aeronautica totalled 719 by the end of 1938. Many others were produced for export or for private use with different radial engines like the Alfa Romeo Lynx or Walter Castor.
The Ba.25 remained in service of the Regia Aeronautica as training aircraft during World War II. Some of the aircraft were seized and handed over to the Allies. Paraguay bought four Breda Ba.25, one of them Ba.25Idro. They were used as primary trainers from 1939 to 1945. 
There were many minor variants:
- Main production version.
- Fitted with a 149 kW (200 hp) Alfa Romeo Lynx engine.
- Fitted with a 179 kW (240 hp) Alfa Romeo D2 engine.
- Fitted with a 164 kW (220 hp) Isotta-Fraschini Asso 200 engine.
- Ba.25 Ridotto'
- Reduced-span aerobatic version.
- Ba.25-I (I for Idro)
- Floatplane version (42 built, one for Paraguayan Naval Aviation)
- Primary trainer with a longer wingspan and Walter NZ 120 engine, prototype only.
- Export version with Piaggio-built Gnome-Rhône 7K engine for Norway, China and Ethiopia, among others.
- Royal Hungarian Air Force operated 3 aircraft
- Paraguayan Military Aviation used three Ba.25.
- Paraguayan Naval Aviation used one Ba.25 Idro.
Data from 
- Crew: 2
- Length: 7.80 m (25 ft 7 in) (Breda 25 Idro - 9.1 m (29.86 ft))
- Wingspan: 9.98 m (32 ft 9 in)
- Height: 2.8278 m (9 ft 3.33 in) (Breda 25 Idro - 3.6 m (11.81 ft))
- Wing area: 25.0 m2 (269 sq ft)
- Empty weight: 788 kg (1,738 lb)
- Gross weight: 2,288 kg (5,044 lb)
- Powerplant: 1 × Alia Romeo D2 9-cyl. air-cooled radial piston engine, 180 kW (240 hp)
- Maximum speed: 205 km/h (127 mph; 111 kn)
- Cruise speed: 195 km/h; 105 kn (121 mph) (Breda 25 Idro - 93 mph (150 km/h))
- Stall speed: 71 km/h; 38 kn (44 mph) (Breda 25 Idro - 56 mph (90 km/h))
- Range: 499 km; 269 nmi (310 mi)
- Service ceiling: 7,498 m (24,600 ft)
- Rate of climb: 2.87 m/s (565 ft/min) 
- Aircraft of comparable role, configuration and era
- Related lists
- Ba.25 entry at the Уголок неба website (Russian)
- "La Contribución Italiana en la Aviación Paraguaya" by Antonio Luis Sapienza. Author's edition. Asunción. 2007
- Thompson, Jonathan (1963). Italian Civil & Military Aircraft 1930-1945 (1st ed.). New York. ISBN 0-8168-6500-0.
- Grey, C.G. (1972). Jane's All the World's Aircraft 1938. London: David & Charles. ISBN 0-7153-5734-4.
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